alternator wiring help please!

I don't have info handy on the "newer" trucks but I doubt it matters. Take your meter and check continuity between the two studs. If it is the field they should show very low continuity, and open (infinity) to the case. Now find the VR and examine the connector. Does either of the two wire colors appear at the VR? That one should be continuity. The remaining wire at the alternator should power up and down with the key on/off.

"If" that is indeed what they are, which one is where does not matter on the two studs